A time-dependent gas-phase isovolumetric desorption technique was used to study isotope effects in the diffusive transport parameters of H in 8%CrWVTa reduced activation martensitic steel at 423 to 892K, under driving pressures of 4 x 104 to 105Pa. The diffusivity, Sievert constant, permeability, trap site density and trapping activation energy were found for H and D. A new way was proposed for deriving more accurate T transport parameters.

Study of Isotope Effects in the Hydrogen Transport of an 8%CrWVTa Martensitic Steel. G.A.Esteban, L.A.Sedano, A.Perujo, K.Douglas: Physica Status Solidi A, 2001, 184[2], 409-18